Lock for latches



July 14, 1942.

S. P. GOLDBERG LOCK FOR LATCHES Filed Oct. 51, 1939 2 Sheets-Sheet 1 I621/061 P Gamma W ATTORNEY y 1942- v S.-P. GOLDBERG 2,289,834 7 LOCK FORLATCHES Fired Oct. 31, 1959 2 Sheets-Sheet 2 IIIIIIIIIII IIIIII/ I n/uunIIIIIIlllllllIlIIIII/IIIIIIIIIIII run/"nun I s f/maa P 620% INVENTOPatented July 14, 1942 UNITED STATES PATENT OFFICE LOOK FOR LATCHESSamuel P. Goldberg, Brooklyn, N. Y.

Application October 31, 1939, Serial No. 302,103

4 Claims.

The present latches.

An object of this invention is to provide a device of the charactermentioned, of novel and improved construction, which can be used inconnection with present-day type and even with already installedlatches.

Another object hereof, is to provide a device of the nature set forth,in which there is no increase in the number of separate parts to bedealt with in the installation of a latch set employing this invention,nor is there any material increase in the amount of work one is calledupon to do to install the same.

Another object of this invention is to provide a latch lock of novel andimproved construction, which is positive in its locking and unlocking operations, and which includes means to give audible signal to indicatethat the latch is either locked or unlocked, as the case may be.

A further object hereof, is to provide a latch lock of novel andimproved construction, which is adaptable to be controlled from eitherthe inside of a room, from the outside, or both, as the particular usemay require, and which may be used in connection with latches of varioustypes.

Another object of this invention, is to provide an article of thecharacter described, which when installed in connection with latchmechanism, does not materially alter the appearance and compactness ofpresent latch sets.

A further object is to provide an article as mentioned, which is cheapto manufacture, easy to install, which facilitates conveniences in latchuses, which is simple in its operation and eiiicient in carrying out thepurposes for which it was designed.

Other objects will become manifest as this disclosure proceeds.

In the accompanying drawings forming part of this application, similarcharacters of reference indicate corresponding parts in all the views.

Fig. 1 shows the present invention in connection with a latch set, usedin a manner whereby the latch, without opening the door, may be lockedor unlocked by means of a finger-piece from the inside of the room, andby a key-means from the outside. This figure is a diagrammaticrepresentation showing the components of the latch set, slightly apartrather than in true assembled position, to aid towards a clearervisualization of the set up.

Fig. 2 is a bottom view of Fig. 1.

Fig. 3 shows the front View of the key-hole piece included in theforegoing views.

invention relates to locks for Fig. 4 shows a form of key, suitable forthe component illustrated in Fig. 3.

Fig. 5 is a partial section through the units comprising this invention,taken at and along line 5-5 in the Fig. 9.

Fig. 6 is a section taken at and along line 66 in the Fig. 2.

Fig. 7 shows the inside of the unit indicated generally by the numeral25, minus parts housed therein.

Fig. 8 shows the inside of said unit together with its contents inposition whereby the latchs spindle is held against rotation, meaningthe latch is maintained in locked condition.

Fig. 9 is a similar view showing said contents in position whereby thelatchs spindle is free to be turned to retract the latch, meaning thelatch is in unlocked condition.

Fig. 10 shows the present invention used on a type of latch set, whichemploys a two-part spindle and carries a key-operative means within theknob which is outside the room, whereby, without opening the door, thelatch is locked or unlocked from the inside of the room by means of afinger piece, and from the outside, by key or freely, respectively.

Fig. 11 shows the present invention used in connection with an ordinarycloset door latch-set, whereby the latch can be locked or unlocked by akey-operative means from the outside of the closet only.

Fig. 12 shows diagrammatically, a section through a common latch unit,as taken along l2-|2 in Fig. 1, and as would appear along line |2-|2' inFig. 10.

Fig. 13 shows diagrammatically, a section taken at line l3l3 in Fig. 12,to illustrate the construction found in the latch of Fig. 10, whichutilizes a two-part spindle.

In the drawings, I have shown several ways of adapting my presentinvention for connection with latches of various types and uses.

The knobs l9 and 2B, the spindle 2| Which has a square cross section,and the unit indicated by the numeral 22, are of an ordinary latch set.However, for the use made of my invention in the set up shown in Fig. 1,instead of the usual rosettes 0r escutcheons 23 which complete the latchset as commonly constituted, I substitute the units indicated generallyby the numerals 24 and 25.

The unit 24 comprises a rosette 26, through which, near its periphery,is journalled a socket piece 21, having a key socket 28 at its forwardend for reception of key 29, and a rectangular socket to receive theblade 3|. Of course, any other suitable key form or wrench meansconvenient to be treated as a key, may be used in place of the oneillustrated.

The unit 25 comprises a rosette 32, through which said blade 3| issuitably journalled in position adapted for axial alignment with thesocket piece 27; said blade here terminating outside the rosette 32, ina finger piece 33. Inside said rosette, blade 3| carries a cam 34, whichfor its intended function may be rectangular and substantiallyconcentric with respect to said blade.

Integral with the rosette 32, are screw tubes 35, against two of whichas stops, rests a spring 36 made of fiat stock, whose ends lie along theinner rim of the rosette. This spring also rests, under stress, againstthe cam 34. Against the spacer boss 36 and between the track elements31, is free to slide the spindle lock plate 38, the position of which isdetermined by the angular position of the blade 3|, because an end ofsaid plate 38 rests against, or in the set up illustrated, is free torest on said blade 3 The knob spindle 2| is free to turn in bore 39through the rosette 32, but edge 43 of the opening 4| in the lock plate33, lies in abutment with the spindle surface when the blade BI. isaxially turned to shift said plate into such position as is shown inFig. 8, whereby rotary axial movement of the spindle 2| is prevented,thus locking the 1 latch bolt 42 of the unit 22. When blade 3| is turnedto assume the position shown in Fig. 9, the spindle 2| is again free toturn, because the lock plate 38 is now free to be shifted toward blade3|, when the latter is turned by either of the knobs H! or 2B. In fact,in the set up described and illustrated, said lock plate 38 will freelyfall onto blade 39, due to action of gravity. However, the line ordirection of movement of the lock plate 38 is immaterial to properoperation of the device, and the arrangement wherein the lock plate 33moves downward for unlocking, though desirable, is not essential.

Utilization of the cam 34, affords comparatively broad surfaces againstthe spring to insure a more positive stay for the blade positions, sothat the knob spindle 2| is more securely locked or unlocked thanheretofore obtainable. There cannot occur any accidental unlockings norintermediate positions of the blade 3|, for the spring causes theoperating blade 3| always to be at either complete locking or unlockingpositions. Also, it is to be noted that the spring 35, in its movementsto fuller stressed or to lesser stressed conditions, will cause aclicking sound to occur,

thus advising of the completion of shift to either positive locked orpositive unlocked conditions of the device. Furthermore, it is desirablethat the dimensions of the cam 34 be such with respect to the dimensionsof the operating blade 3|, that the amount of shift of the spring shallexceed the amount of urged shift of the locking plate 38. This can beaccomplished by a cam shaped as 34 shown only in Fig. 7. The operationof the device is obvious from the above, and its adaptation to presentinstallations is evident, for all that is required, is, that therosettes which would be of the type as indicated by the numeral 23 inFig. 11, be removed, and units 24 and 25 be mounted in their place,namely, unit 25 on the surface of the door which is inside the room, andunit 24 on the outside; the telescopic action of the blade 3| into thesocket piece 2?, taking care of various door thicknesses.

Depending upon the specific uses to which this invention may beemployed, will govern which of the units 24 or 25 will be fitted with orwithout finger piece 33 or a key socket means as 28, and in an instancenow to be described, the unit 24 is entirely dispensed with. Such lattercondition is shown when the locking device is to be applied to closetlooks, as an example. Here, in Fig. 11, for the finger piece 33 in thearrangement shown in Fig. 1, the unit 25, is instead provided with a keysocket 28, and socket piece 2'! becomes unnecessary. The latch 42 islocked or unlocked, merely by use of a key 25.

Referring to Fig. 10, where my invention is shown used with a latch setemploying a twopart spindle, my units 24 and 25 are mounted in reverseorder to that shown in their use in Fig. 1, the finger piece 33 isomitted from unit 25, but is substituted for the key hole 28; all othermechanism remaining. The spindle here is in two parts designated by thenumerals 43 and 44. Through the axis of spindle 44, lies a loose shaft45, which is secured to spindle part 43 and extends out of spindle part44, and terminates in a slotted head 45, which head is engaged by tab47, of a key'cylinder means 48 housed in outside knob 49, carried onsaid spindle part 44.

Ordinarily, in single spindle latches as 2|, the spindle carries a hubhaving the outwardly extending lugs 52. Upon axial rotation of thespindle, it is obvious that the latch 42 will be retracted because 53 isa collar on pin 54, while 55 is a lug integral with the frame 55. Theremainder of Fig. 12, is obvious without further description and is wellknown. The construction having the two hubs 5i] and 5|, for the two-partspindle construction, is also old, and therefore needs no furtherdetails to be described for the purposes herein. It is sufficient tomention that hub 5| is mounted on spindle part 44 and that hub 50 ismounted on spindle part 43.

Coming back to Fig. 10, it is obvious that unit 25 controls themovement, that is, looks or unlocks the spindle part 44. When inunlocked condition, turning knob l9 will cause hub 50 to retract thelatch 42, while when knob 49 is turned, it will cause hub 5| to retractsaid latch. Now if finger piece 33 is shifted upwards to either side,spindle part 44 is locked. The latch 42 is free to be retracted by meansof knob I9. It is evident that knob 49 cannot be turned. But with aproper key in 48, tab 41 can be made to turn shaft 45, which action willof course turn the spindle part 43, and the door will open.

This invention is capable of numerous forms and various applicationswithout departing from the essential features herein disclosed. It istherefore intended and desired that the specific embodiments and usesherein set forth shall be deemed illustrative and not restrictive, andthat the patent shall cover whatever features of patentable novelty areherein included; reference being had to the following claims rather thanto the particular description herein to indicate the scope of theinvention.

I claim:

1. A look for the spindle of a door latch, comprising a rosette adaptedto be mounted on the door, provided with a bore to receive the spindletherethrough, a' member of elongated cross-section axially rotatablymounted within the rosette, provided with an operating element at theexterior of the rosette, a locking plate freely movably mounted withinthe rosette, adapted to be shifted by and upon rotation of said memberto a position whereby said plate contacts and maintains the spindle ofthe door latch against axial rotation; the respective axes of rotationof the spindle and the said member being substantially parallel, a camhaving the vertices of an oblong carried on said member, and a bladespring positioned within the rosette, adapted to exert a constant stressagainst the cam along a line substantially perpendicular to the axis ofrotation of the aforementioned member; said spring resting upon two ofsaid vertices in rest position.

2. A look for the spindle of a door latch, comprising a rosette adaptedto be mounted on a door, provided with a bore to receive the spindletherethrough, a member of elongated cross-section axially rotatablymounted within the rosette, provided with an operating element at theexterior of the rosette, a locking plate freely movably mounted withinthe rosette, adapted to be shifted by and upon rotation of said memberto a position whereby said plate contacts and maintains the spindle ofthe door latch against axial rotation and in locked condition; therespective axes of rotation of the spindle and said member beingsubstantially parallel, a cam carried on said membenand a blade springpositioned within the rosette, adapted to exert a constant stressagainst the cam along a line substantially perpendicular to the axis ofrotation of the aforementioned member; said cam, upon movement of theplate to lock the spindle, being adapted to shift the spring beyond thenormal position of the spring when the spindle is in locked conditionand free the spring to shift from the position it assumes at suchmaximum stressed condition to its normal rest position when the platecomes to rest, whereby an audible signal is emitted upon the springcoming to rest against the cam.

3. A look for the spindle of a door latch, comprising a rosette adaptedto be mounted on the door, provided with a bore to receive the spindletherethrough, a member of elongated cross-sec tion axially rotatablymounted within the rosette, provided with an operating element at theexterior of the rosette, a locking plate loosely movably mounted withinthe rosette, adapted to be shifted by and upon axial rotation of saidmember, to a position whereby said plate abuts and maintains the spindleof the door latch against axial rotation; the respective axes ofrotation of the spindle and the said member being substantiallyparallel, a cam having the vertices of an oblong, carried on said memberand a spring positioned within the rosette, adapted to exert a constantstress against the cam along a line substantially perpendicular to theaxis of rotation of the aforementioned member; the difierence betweenthe major axes of the cam and said member being greater than thediiference between the minor axes of said cam and member, whereby thecam is adapted to shift the spring through a range of movement greaterthan the range of movement of the locking plate actually caused by thesaid elongated cross-sectioned member.

4. A look for the spindle of a door latch, comprising a rosette adaptedto be mounted on a surface of the door, a second rosette adapted to bemounted on the opposite surface of the door; each rosette being providedwith a bore to receive the spindle therethrough, a blade axiallyrotatably mounted within the first rosette, a locking plate looselymoveably mounted within the first rosette, adapted to be shifted by andupon axial rotation of the blade, to a position whereby said plate abutsand maintains the spindle of the door latch against axial rotation; therespective axes of rotation of said spindle and blade beingsubstantially parallel, a cam having the vertices of an oblong, carriedon the blade within the first rosette, a spring positioned within saidfirst rosette, adapted to exert a constant stress against the cam alonga line substantially perpendicular to the axis of rotation of the blade,an element provided with a socket, axially rotatably mounted within thesecond rosette and adapted to receive the blade within said socket uponmounting the rosettes on the door; the respective axes of rotation ofthe blade and said element being in alignment, and means extending atthe exterior of the second rosette adapted for movement to cause axialrotary movement of said element; the difference between the major axesof said cam and blade being greater than the difference between theminor axes of said cam and blade, whereby the said cam is adapted toshift the spring through a range of movement greater than the range ofmovement of the locking plate actually caused by th blade.

SAMUEL P. GOLDBERG.

